July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

UHECR acceleration at GRB internal shocks

Aug 4, 2015, 4:00 PM
Amazon Foyer (World Forum)

Amazon Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 197
Poster contribution CR-TH Poster 3 CR


Noemie Globus (Tel Aviv University)


Recent results from Auger suggest that there might be a significant heavy component in high energy cosmic rays. It is therefore interesting to explore the possibility to accelerate not only protons but also complex nuclei in relativistic jets. We developed a numerical tool inspired by the work done by Niemiec and Ostrowski (04) to compute the acceleration of particles at midly relativistic shocks. This code includes energy losses of protons and nuclei and handles particle escape from the jet according to specific prescriptions, which can be adapted to different astrophysical environments and physical conditions. We first applied our code to the case of GRBs internal shocks. Physical quantities and their time evolution, relevant to cosmic-ray acceleration and energy losses, are estimated using the internal shock model of Daigne & Mochkovitch (98). We calculated the cosmic rays escaping from the jet environment but also secondary photons and neutrinos (produced both during the acceleration process and the UHECRs extragalactic propagation). The conditions for GRBs internal shocks to be the sources of UHECRs as well as the role of the key physical parameters are discussed.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 573

Primary author

Noemie Globus (Tel Aviv University)


Dr Denis Allard (APC Laboratory) Etienne Parizot (Université Paris Diderot / APC) Dr Robert Mochkovitch (IAP)

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